| 摘要 |
PROBLEM TO BE SOLVED: To suppress changes in the focus voltage, even if the screen voltage is changed after fixing the focus voltage. SOLUTION: A resistor 8 is connected to a focusing output terminal. To one end of the resistor 8, voltage-dividing resistors 14, 15, 17 voltage-dividing resistors 9, 11, and a high voltage transistor 10 are connected. The collector of a transistor 16 is connected to a connection between the resistors 14 and 15. The transistor 16 is controlled with the voltage of the resistor 17 as the reference, and the transistor 10 is controlled with the voltage of the resistor 11 as the reference.
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